Adjustable fuel burning nozzle



Oct. 13, 1931. a. w. JARVIS ADJUSTABLE FUEL BURNING NOZZLE Filed Jan. 24, 1928 Graham W ylw Jarvzs,

W w g; m a JM/ .rl/fll z \WWWMIMM Z O m Patented Oct. 13', 1931 GRAHAM WY" LIE :ranvrs, or? crrARLorT-EsvILLE, wtxrianv'mj ASSIGNOR or ONEEHALF To Jo n: n. -snnrirnnn, or cHAR or'rnsvILLn, :VIRGINIA ADJUSTABLE-T111511. BURNIliG'. 'nazzm i This invention relates to mixing "nozzles forfluid fuel burners, and more'zparticu'larly to oil "burner nozzles; thoughit iS nOtedthatF M the invention is not? limited to nozzles LfOiL Oll' burners nor in. some" respects: even 'toi: fuel' burners.

One object of the invention is to -provide a nozzle device of this'kind capabl of adjustment for efie'ctively varying the" width and heating a'rea of the flame; I i Another object of the invention is to pro'- vide a device 'ofthis kindyfor providing wide flare to theflame and an inductive action of compressed air or other combustion sup porter which will-drawthefuel into and from the nozzle. a i 1 Another object of theinfvehtion is 'to provide' an apparatus r device" otthis kind which will 1 effect a thorough mixing Faction nomical to manufacture. Still other objects of' the, invention will appear as thez description proceeds;v and while hereinidetailsofthe invention are de scribed and claimed, theinvention is not limited to these, .since many and] various changes. may be made without departing from the scope of the'invention as claimed infthe broader claims. Y

The inventiv'effeatures for the accomplish ment of these and other objects are shown herein" in connection with an improved "oil burner nozzle which, 'brieflystated, includes a" tubular compressed' a-ir" nOzzle meniber having "therein a transverse spider having passageopenings and a central opening, the exterior of said'meinber having'thereon an annularf wall" 'near the upperend provided with passage slots; A tubularouter: Wallis received. on 'said member and engages said annular, wallto'iorm awensfuehinletrsp'ace oft-he fuel and" combustion supporter and reliable and lasting inoperation; and eco-' I Application nld 'ianhaizg192a; seri 'i' no. 249,084.

upper discharge space; The upper e'n'dzlfacesof saidwall'andmember are up wardly and outwardly beveled to lie in the same conical surface and are spaced apart tofit'orin'a fuel-jet orifice. A spreader disposed over the inner face is provided with a shank'in'threaded engagement with said centralopening, and a slotted head having a lower conical face parallel with said faces and closely adjustableto-said face of'the' inner'member to direct compressed air across said orificevto draw fuel from said orifice and discharge the mixture outwardly and up- In the accompanying drawings, showing by bodim'ents'of the'invention,

Fig.1 is a side elevation showing the burner assembled;- 4 I r j Fig. 21is an axial 'vertical' sectional view, partly-in sembledf V i Fig. 3 is a fragmental axial vertical seo way of example, one of many possible emtional view, *partlytin' elevation, showing the I burner-adjusted for a "slightly flaring flaine;

'a'vertical fire tube 12 and a'lower horizon' tal tube sheet 13 forming a lower combustion chamber-"14' in which is disposed the nozzle burner IQ-"adapted" to produce a wide flaring flame just'beneath-thetube sheet," as will be explained. l V v v It isnoted however thatthe invention: is in noiway 'liinited to a, boiler," be' used for any purpose desired; r

,My in'i-proved nozzle burner comprises an outer'nozz'le wall 15 (Fig. 2);"and an inner tubular nozzle member 16 formedwithan,

s the burner may I elevation,- showingthe burner asabove said lower end portion 17 is much smaller in exterior diameter than said end portion, and is provided with a wide annular wall 25 near the upper end of slightly greater diameter than the intermediate and upper part of said face, to provide upper and lower fuel 26 and 2'? and an upper fuel mixture space. Said. annular wall 25 is provided with a series of diagonal passage slots 28 6 and 7) disposed therearound, all inclined in the same direction around the walh to give a twisting motion to fuel passing from said lower space 27 to the upper space 26;

The outer tubular nozzle wall 15 is received on said. inner member 16 against said enlarged portion 17, the lower part of its inner face having threaded connection with the threads 30 of the inner member. The upper portion of said inner face is cylindrical and has substantially fuel-tight engagement with said annular wall 25. The upper face 31 of said nozzle wall is upwardly and outwardly beveled to lie in the same conical surface with the upper face 20 of the inner nozzle member. and is slightly spaced therefrom to form a thin annular jetorifice 38 communicating with said upper space 26 The intermediate part of said outer wall 15 is provided with a lateral fuel inlet opening 35 communicating with said lower space 27 and receiving the upper threaded end of a fuel supply elbow 36 having exterior'threads at its outer end 37 for connection with a pipe. or hose (not shown) to a low down tank or other fuel supply.

A spreader screw 40 having a lower threaded shank 4L1 adjustably disposed in said central opening 22 has its head provided with a lower conical face 42 parallel with said beveled faces and an upper transverse tool-receiving slot 43 for adjustment. Said head has substantially the same diameter as the outside diameter of the inner tubular member 16 and said conical face 42.n1ay be adjusted close to said beveled face 20 to direct com arcssed air from the inner nozzle member across said jet orifice to draw fuel up through said elbow-36, lower space 21 passage slots upper space EZGand jet orifice 33, mix it with the air and dischargethe mire ture in an outwardly and upwardly flared stream indicated bythe arrows 3 t 51 .to feed the flame.

widely flaring and rected than in Fig. 5, and a flame of smaller Said spreader head is adjustable to vary the effective. heating area of the flame, and when adjusted close to the beveled face 20, causes a thin, stiff, widely flaring stream, as indicated by the arrows of Fig. 5 producing a very wide flame of large heating area. Said head, when adjusted further fromthe face 20, as in Fig. 4, gives a stream less stiff, less more upwardly diheating. area. When said head is adjusted still further from the face 20, it gives a stream. still less stiff. less widely flaring and more upwardly directed, as indicated in Fig. 8., and a flame of still smaller heating area.

' I claim as my invention: i i

' 1. In a burner, an outer casing having a lateral fuel inlet opening intermediate its ends, an inner member having a threaded portion screwed into the lower end of the outer casing. said inner member having a fluid passage extending axially from end to end, said inner member having a circumferential fuel channel opposite said inlet por tion, said inner member having its upper portion spaced concentrically to the inner wall of the outer casing and having the portion between its channel and upper end fitting closely in the outer casing. said inner member having a helically extending groove leading from the channel to the space at the upper end. and a spreader carried by the inner member and having screw thread adjustment relative to the space between said casing and member, said casing and member having their upper edges beveled to lie in the same inverted frusto-conical surface and the spreader having like inverted frusto-conical under surface and having a conical upper surface meeting the under surface in. a sharp edge.

2. In aburner, an outer casing having a lateral fuel inlet opening intermediate its ends, an inner member having a threaded portion screwed into the lower end of the outer casing, said inner member having a fluid. passage extending axially from end to end, said inner member havinga circumferential fuel channel oppositesaid inlet portion, said inner member having its upper portion spaced concentrically to the-inner wall of the outer. casingand having the portion between its channel and upper end fitting closely in the outer casing. said inner member having a helically extending groove leading from the channel to the space at the upper end. said innermemher having a peripheral groove at each end of said diagonal groove, and a spreader carried by the inner member and having screw thread adjustment relative to the space between said casing member. said casing and member having their upper edges beveled to lie in the same inverted frusto-conical surface and the spreader havinga like inverted frusto-conical under surface and having-a conical upper surface meeting the under surface in a sharp edge;

3. A burner embodying outer'and inner tubular members having conically alined 3 upper end faces and having threaded engagement, the outer member having a lateral fuel inlet, the inner member having a circumferential channel and a wall provided with slanting parallel grooves, a screw adjustable relative to the conically alined faces of the said members, the screw having a head formed with opposed upper and lower conical faces and having a diameter substantially equal to the outer diameter of the inner member. 4. In a burner, an outer casing member having a lateral fuel inlet'intermediate its ends, an inner member having a fuel passage from end to end, a circumferential fuel channel communicating with the fuel inlet, an an- I nular wall dividing the said channel and having helical parallel passages, the outer and inner members having threaded engagement; the upper ends of said members havlng conically alined faces, a spreader screw adjustably connected to the inner member, its head being formed with lower and upper conical faces and being of a diameter substantially corresponding to the outer diameter of the inner member. p 5. In a burner, outer and inner tubular members, the outer member having a lateral fuel inlet, the inner member having a unitary spider provided with ports and a central threaded bore, the inner member also hav ing a circumferential channel opposite the fuel inlet anda wall in said channel having helical parallel slots, a screw in' adjustable engagement with the threadedbore, its head having upper and lower opposed conical faces 40 and having a diameter substantially equal to the outer diameter of the inner member.

Signed at Charlottesville, in the county of Albemarle and State of Virginia this 29th day of December'A. D. 1927.

' GRAHAM WYLIE JARVIS. 

